褪黑素对荫蔽环境下燕麦生理生化特性的影响OA

This experiment aimed to address the problem of growth inhibition of Avena sativa L.under shading and low light conditions between photovoltaic panels.Using'Kona'oats and plant regulator melatonin(MT)as materials,treatments,including a normal light control(CK-Z),a shading stress control(CK-F),and treat-ments with 20,40,60,80,and 100 mg·L-1melatonin(MT)sprayed under shade a pot experiment were con-ducted.The growth and physiological indicators at 30 and 50 days after emergence were measured,and the regulatory effect was evaluated by correlation analysis and membership function.Compared with CK-Z,CK-F significantly reduced oat stem thickness,dry weight,and antioxidant enzyme activity,while increasing plant height,fresh weight,and MDA(Malondialdehyde)content(P<0.05);Spraying MT could improve its growth physiological indicators,with a significant positive correlation between stem thickness and fresh weight,dry weight,etc.(P<0.01),a positive correlation between SOD(Superoxide dismutase)and plant height(r=0.075,P<0.05),and a negative correlation between MDA and dry weight;The membership function indi-cated that the comprehensive evaluation value(D=0.89)was the highest when treated with 80 mg·L-1 MT for 50 days.Exogenous MT enhanced the antioxidant system and alleviated shade stress.The optimal combina-tion of 80 mg·L-1 MT treatment for 50 days provided a solid theoretical basis for improving oat shade tolerance and grass cultivation in photovoltaic areas.